A new SAW-resonator with electronically switchable resonance frequency

Author

Johannes, Thomas W. ; Ruppel, Clemens C W ; Ruile, Werner ; Scholl, Gerd ; Rosler, U.

Author_Institution

Corp. Technol., Siemens AG, Munich, Germany

Volume

1

fYear

1997

fDate

5-8 Oct 1997

Firstpage

23

Abstract

A new two-port SAW-resonator is presented. Its transmission frequency can be switched between two discrete resonances by changing the electrical termination of additional transducers within the resonator´s cavity. This can be done by mechanical switches or by FETs which allow for electronical switching with low power consumption. The device can be applied to provide a simple change of a transmitters carrier frequency. It may be also used for low-cost, low-bit-rate frequency shift keying transmission systems. Extending the principle to more than two resonances a switchable oscillator for channel selection can be realized. In this case an advantageously low oscillator´s phase noise is achieved. This is due to the high quality factor of SAW-resonators

Keywords

acoustic noise; surface acoustic wave oscillators; surface acoustic wave resonators; surface acoustic wave transducers; switching; ultrasonic transmission; FETs; SAW-resonator; SAW-resonators; channel selection; electrical termination; electronically switchable resonance frequency; high quality factor; low power consumption; low-cost low-bit-rate frequency shift keying transmission systems; mechanical switches; phase noise; resonator cavity; switchable oscillator; transducers; transmission frequency; transmitter carrier frequency; two-port SAW-resonator; Energy consumption; FETs; Frequency shift keying; Oscillators; Phase noise; Q factor; Resonance; Switches; Transducers; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE

Conference_Location

Toronto, Ont.

ISSN

1051-0117

Print_ISBN

0-7803-4153-8

Type

conf

DOI

10.1109/ULTSYM.1997.662972

Filename

662972